[Bug 1326688] Re: Can't disable panning on multiple monitors

[Richard Casemore]

I am using my tablet as an external monitor with VNC.

$ lsb_release -rd
Description: Ubuntu 14.04.1 LTS
Release: 14.04

$ xrandr --output DVI-I-2 --fb 3200x1080 --panning 0x0+0+0

$ xrandr | grep DVI-I-2

DVI-I-2 connected primary 1920x1080+0+0 (normal left inverted right x
axis y axis) 530mm x 300mm panning 3200x1080+0+0

Panning still happens. I had it working March 2013, I don't know when it
stopped working as expected.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: xorg-server (Ubuntu)
Status: New => Confirmed
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[prs]

Since upgrade to 14.04 can not use external monitors due to this panning
problem on my Lenovo W520

$ dpkg --get-selections | grep nvidia
nvidia-343 install
nvidia-343-uvm install
nvidia-opencl-icd-343 install
nvidia-prime install
nvidia-settings install

Please get this fixed soon or next laptop will be some fruit...
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[Onno Kortmann]

Hi,

I have a W520, too, and have exactly the same problems since an LTS->LTS
upgrade to 14.04. I now at least have a semi-workaround when starting
the display manager with two screens:

Using nvidia-settings, I was able to generate a xorg.conf file that
starts with a working two-screen configuration, without panning. File is
attached. I guess you'd either need to adjust the values specific to my
setup, or try to use nvidia-settings to generate a fresh configuration
file. Important hint is to click on 'Advanced...' at the bottom to get
the panning configuration.

However, when switching between single- and dual-screen modes, screen
panning will reappear and I have not figured out how to solve that yet.
Switching to single-screen mode works once, using

xrandr --output LVDS-0 --mode 1600x900 --pos 0x0 --output DP-0 --off
--output VGA-0 --off

Hope this helps.

** Attachment added: "xorg.conf file working on W520 for dual screen without panning"
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+attachment/4269592/+files/xorg.conf
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[Thomas C. Blank]

I have these problems on a W520 (i.e. Nvidia driver), but on Arch Linux.
Still, what I have found, and a workaround:

The Nvidia driver will try to make the whole size of the screen (set
with xrandr --fb or by placing monitors) accessible with the monitors it
has, and if need be with panning. It will ignore or overwrite all
attempts to disable that panning if the driver thinks you need it. (It's
a feature, they brag about it under question "How are virtual screen
dimensions determined in TwinView?" at
http://us.download.nvidia.com/XFree86/Linux-
x86_64/346.35/README/configtwinview.html

On my setup, I use two external monitors that are connected to the Nvidia card along with the built-in monitor that is connected to the internal Intel chip. The intel chip servers as a Sink provider for the Nvidia driver, so all three monitors form a single screen, like so:
xrandr --setprovideroutputsource modesetting NVIDIA-0
xrandr --fb 5760x1200
--output LVDS-1-0 --mode 1920x1080 --pos 3840x120
--output VGA-0 --mode 1920x1200 --pos 1920x0
--output DP-3 --mode 1920x1200 --pos 0x0

The nvidia driver (so it seems) will accept that the whole screen is now
5760x1200 big, but only uses the two monitors that are actually
connected to the card to "cover" that area with panning. So the right-
most laptop display worked fine, while the two monitors would pan along
left and right.

I have worked around this by abusing that while the Nvidia driver ignores or overwrites the core panning parameters, it doesn't meddle with the panning border. I modified the command above like so:
xrandr --fb 5760x1200
--output LVDS-1-0 --mode 1920x1080 --pos 3840x120 --panning 5760x1200+0+0/0x0+0+0/-3840/0/0/0
--output VGA-0 --mode 1920x1200 --pos 1920x0 --panning 5760x1200+0+0/0x0+0+0/-1920/0/-1920/0
--output DP-3 --mode 1920x1200 --pos 0x0 --panning 5760x1200+0+0/0x0+0+0/0/0/-3840/0

This sets the borders that trigger the panning so far out that they are
all off screen. So panning is technically still enabled but impossible
to trigger.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[Brett Sutton]

A quick work around that I've found.

2nd monitor attached to a laptop.

Enable second monitor as primary.

Second monitor appears to the left of the laptop monitor.

Panning problem occurs.

Go into the gnome 'Arrange Combined Displays'.

Reverse the order of the monitors (2nd now arranged to right of laptop monitor).
Apply and Confirm settings.

Go back into 'Arrange Combined Displays'.

Reverse the order of the monitors again so the external display is once again to the left of the internal display.
Apply and Confirm settings.

Panning problem is now fixed.

Not a solution but....
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[prs]

Not nice but https://bugs.launchpad.net/ubuntu/+source/xorg-
server/+bug/1326688/comments/6 works for me.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[Pablo]

Has there been any fix for this yet?

The workaround in #5 works most of the time, but has some issues.
I don't have gnome.

My setup:
Notebook with internal 1920x1080 screen,
1920x1200 Screen attached via hdmi
1280x1024 screen attached via usv graphics card
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[Cody Creager]

I found a different work around that works consistently for me. I'm
actually using gentoo linux with xorg-server-1.17.4, gnome-3.18.0, and
xrandr-1.4.3. Looks to me like Thomas C. Blank was on the right track.

I have an NVIDIA card with a 1680x1050 monitor and a 1920x1200 monitor.
And an Intel card with a 1920x1080 monitor. They are in that order
left-to-right.

First, I had to disable xinerama in my xorg.conf because it conflicts
with xrandr.

When I first log in, the nvidia monitors are in the correct orientation,
but I have to connect the Intel output source with: xrandr
--setprovideroutputsource Intel NVIDIA-0

Then I can enable the output either through gnome's display settings or
with xrandr(DVI-I-2 being the 1920x1200 monitor): xrandr --output HDMI2
--auto --right-of DVI-I-2

Finally, I convince panning to do what I want with another xrandr call:
xrandr --output DVI-I-2 --panning
3840x1200+1680+0/1920x1200+1680+0/0/0/0/0

This panning instruction says the center monitor pans over a region that contains itself and the right monitor. But it only tracks the mouse pointer over itself. And it has no border.
"The first four parameters specify the total panning area, the next four the pointer tracking area (which defaults to the same area). The last four parameters specify the border and default to 0." -- man xrandr

That same man page continues on to say that width or height set to zero
will disable panning on that axis - which doesn't work.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions

[Joakim Asplund]

I have this problem on Linux Mint 17.1 (Ubuntu 14.04 base) too on a
Lenovo T420s with Optimus graphics using the Nvidia card as primary.

It seems to work as expected if I put the screens in order [LVDS-1-0] --
[VGA-1-0] -- [DP-3] from left to right, but if I put DP-3 in the middle,
I can't disable panning for it.

Just putting the screens in this physical order works for me, but I run
into another problem when I try to set the middle screen (VGA-1-0) to
primary in order to get my KDE taskbar on the middle screen. Trying to
set any of the screens provided by modesetting to primary fails with the
following error:

$ xrandr --output VGA-1-0 --primary
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 30 (RRSetOutputPrimary)
Serial number of failed request: 50
Current serial number in output stream: 52

$ xrandr --output LVDS-1-0 --primary
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 30 (RRSetOutputPrimary)
Serial number of failed request: 50
Current serial number in output stream: 52

I attach my Xorg configuration (generated by nvidia-settings), the Xorg
log file, a dump of 'xrandr --verbose' output and 'xrandr
--listproviders' output.

** Attachment added: "nvidia_multiscreen_problem.tar.gz"
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+attachment/4762455/+files/nvidia_multiscreen_problem.tar.gz
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1326688

Title:
Can't disable panning on multiple monitors

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1326688/+subscriptions